HackMD MCP Server has Server-Side Request Forgery (SSRF) vulnerability

Description

A Server-Side Request Forgery (SSRF) vulnerability that affects all users running the HackMD MCP server in HTTP mode. Attackers could exploit this vulnerability by passing arbitrary hackmdApiUrl values through HTTP headers (Hackmd-Api-Url) or base64-encoded JSON query parameters.

Recommendation

Update the hackmd-mcp package to the latest compatible version. Followings are version details:

• Affected version(s): >= 1.4.0, < 1.5.0
• Patched version(s): 1.5.0

References

• GHSA-g5cg-6c7v-mmpw
• CVE-2025-59155
• CWE-918
• CAPEC-310
• OWASP 2021-A10
• OWASP 2021-A6

Related Issues

• Nu Html Checker (vnu) contains a Server-Side Request Forgery (SSRF) vulnerability - CVE-2025-15104
• Parse Server Vulnerable to Server-Side Request Forgery (SSRF) in File Upload via URI Format - CVE-2025-64430
• Parse Server is vulnerable to Server-Side Request Forgery (SSRF) via Instagram OAuth Adapter - CVE-2025-68150
• google-translate-api-browser Server-Side Request Forgery (SSRF) Vulnerability - CVE-2023-48711

Tags:

npm

hackmd-mcp